find_by_test_id

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, and the description fails to disclose behavioral traits such as what happens if no element is found (throws error?), whether it returns a reference or details, or if it waits for the element. The description only restates the name without adding behavioral context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence, front-loaded and direct. No wasted words. However, it is too terse and could benefit from a brief clarification without losing conciseness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With only one parameter, no annotations, and an output schema (unseen but present), the description is insufficient. It does not explain return value, error conditions, or when to prefer this over other find tools. Lacks critical context for a tool among many siblings.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, and the description does not elaborate on the test_id parameter (e.g., expected format, whether it's a full match or substring). The schema only provides type string, but the description adds no value beyond that.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Find element by data-testid' clearly states a specific verb (find) and resource (element by data-testid attribute). It distinguishes from siblings like find_by_label, find_by_text, etc., which use different selectors. However, it could be more explicit, e.g., mentioning that it finds the first matching element on the page.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives like find_by_text or find_by_role. Does not indicate that data-testid is typically more stable for automated testing, nor when this should be preferred.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.